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CPST · Calamos S&P 500 Structured Alt Protection ETF - September · Short Volume ETF

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$28.16 -0.03 (-0.10%) At close · Oct 23
Volume · Oct 23 781 Avg daily vol (3M) 8074

Daily short-sale volume published by FINRA from its trade-reporting facilities. It measures how many shares were sold short each day as a share of total volume — a daily flow, not the total outstanding short position.

Pull daily short volume through the short interest API or MCP →
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    • Short Volume

    Date Short Volume Short Exempt Total Volume Short %
    2026-10-23 669 0 777 86.1%
    2026-10-22 594 0 2,631 22.6%
    2026-10-21 1 0 1 100.0%
    2026-10-20 2 0 313 0.6%
    2026-10-19 101 0 1,016 9.9%
    2026-10-16 1,562 0 5,074 30.8%
    2026-10-15 2 0 16 12.5%
    2026-10-14 2,474 0 3,591 68.9%
    2026-10-13 1 0 4 25.0%
    2026-10-12 1,129 0 2,029 55.7%
    2026-10-09 102 0 188 54.2%
    2026-10-08 800 0 818 97.8%
    2026-10-07 4,423 0 15,793 28.0%
    2026-10-06 22 0 279 7.9%
    2026-10-05 502 0 1,581 31.8%
    2026-10-02 1,430 0 1,791 79.8%
    2026-10-01 87,591 0 87,695 99.9%
    2026-09-30 3,104 0 3,905 79.5%
    2026-09-29 991 0 2,128 46.6%
    2026-09-28 16 0 23 68.2%
    2026-09-25 2,133 0 2,826 75.5%
    2026-09-24 1,173 0 1,174 99.9%
    2026-09-23 21,847 0 21,886 99.8%
    2026-09-22 3,242 0 3,387 95.7%
    2026-09-21 1,095 0 1,168 93.7%
    2026-09-17 7,125 0 10,154 70.2%
    2026-09-16 1,372 0 2,789 49.2%
    2026-09-15 3,123 0 6,712 46.5%
    2026-09-14 2,730 0 4,636 58.9%
    2026-09-11 2,051 0 3,898 52.6%
    2026-09-10 1,795 0 6,418 28.0%
    2026-09-09 5,230 0 5,719 91.5%
    2026-09-08 3,047 0 4,185 72.8%
    2026-09-04 8,052 0 8,062 99.9%
    2026-09-03 18,926 0 20,123 94.1%
    2026-09-02 12,905 0 14,895 86.6%
    2026-09-01 38,363 0 55,917 68.6%
    2026-08-31 3,740 0 5,894 63.5%
    2026-08-28 412 0 1,753 23.5%
    2026-08-27 74 0 85 87.5%
    2026-08-26 2 0 6 33.3%
    2026-08-25 842 0 1,048 80.3%
    2026-08-19 3 0 32 9.4%
    2026-08-18 1 0 457 0.2%
    2026-08-17 18 0 55 32.7%
    2026-08-13 3 0 25 12.0%
    2026-08-12 11 0 1,030 1.1%
    2026-08-11 203 0 2,349 8.6%
    2026-08-10 1 0 570 0.2%
    2026-08-07 1 0 5 20.0%
    Showing 1–50 of 58 days